Boyz II Men will be launching a U.S. tour in Nashville on April 29 with Dru Hill and K-Ci & JoJo opening up on select dates.

In announcing details of the tour, Boyz II Men pledged to begin each concert with a 60-second anti-smoking film the group recently shot at the behest of the federal department of Health and Human Services. The spot depicts Boyz II Men choking in a smoke-filled room, and then (once the smoke has cleared) bursting out in clear, airy harmonies.

The group says it had to cancel some shows in Japan three years ago when Wanya Morris developed a sore throat from second hand smoke.